Biofuels: ?are they really friendly with environment?

At the present time worldwide level is had an environmental problematics generated by the global warming, one of the cause of this problem are the emission of greenhouse gases, derived from the use of fossil fuels. With the development of the biotechnology one has found in the production of biofuels an option for the generation of energy, which comes being developed in several countries. The present article is a document of bibliographical review that seeks to present a general vision on the biofuels, making see the positive and negative aspects that his production to industrial level they imply; also it shows how it comes being applied this technology in Colombia and one wants to make see as the bioethics can help in the analysis of the situations derived by the use and implementation of this technology.